Is there a way to dump the configuration of my Mikrotik so that I can share the config with everyone here on the forum?

use the word 'export' at any level to export everything at that level and below.

/export
/export file=config
/ip address export
/ip route export
etc ...

Enter the command line through winbox, use any of the samples provided by changeip and use ur cursor to copy and paste as appropriate.

Psst rightclick the winbox terminal and select "copy all"

How exactly (I'm using Winbox 3.18) ?

Okay,
Assuming your using winbox, go down the left hand menu (LHM) and peruse the selections until you find "terminal"
Then in the terminal window type
/export hide-sensitive file=yourconfigmar06

and enter.

Then go back to the LHM and select files.
YOu should see the file you created on the list that shows.
Right Click ( I think ) on the filename to download it to your PC.
(I prefer to use notepad ++ for all mikrotik config file work.

Then copy and paste the file into a post and then look above and see the black square box with white brackets where the BOLD and UNDERLINE are located.
Highlight your config and then select that icon (coding format).

That should be it.
I always have a look at my config however before I submit to ensure that no items that I want to hide are being shown
(for example my non standard SSH or WInbox ports, my isp gateway IP or my WANIP)